ISO INTERNATIONAL STANDARD 8780-2 First edition 1990-11-15 ANSl Internat Doc Sec Pigments and extenders --- Methods of dispersion for assessment of dispersion characteristics -- Part 2: Dispersion using an oscillatory shaking machine Pigments et matieres de charge --- Methodes de dispersion pour evaluer la dispersibilite Partie2:Dispersiona I'aide d'unemachine a secousses Reference number ISO 8780-2:1990(E) Propvriaht lnter or Standardizatior No reproduction or networking permitted without license from IHS Not for Resale ISO8780-2:1990(E) Foreword IsO(theInternationalOrganizationforStandardization)isaworldwide federation ofnational standards bodies (iso memberbodies).Thework of preparing Internationai Standards is normally carried out through iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with isO, also take part in the work. iso collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Interna- tional Standard requires approval by at least 75% of the member bodies casting a vote. International Standard iso 8780-2 was prepared by Technical Committee iSO/TC35,Paintsandvarnishes. Iso 8780 consists of the following parts, under the general title Pigments and extenders--Methods of dispersion forassessment of dispersion characteristics: Part 1: Introduction Part 2:Dispersion usingan oscillatory shakingmachine Part 3: Dispersion using a high-speed impeller mill Part 4: Dispersion using a bead mill - Part 5: Dispersion using an automatic muller Part 6: Dispersion using a triple-roll mill Annex A forms an integral part of this part of iso 8780 CISO1990 permission inwritingfromthepublisher. InternationalOrganizationforStandardization Case Postale 56:CH-1211 Geneve 20·Switzerland Printed in Switzerland Copyright Intern: onal Organization for Standardization No reproduction or ne etworking permitted without license from IHS Not for Resale ISO 8780-2:1990(E) INTERNATIONAL STANDARD Pigments and extenders --- Methods of dispersion for assessment of dispersion characteristics Part 2: Dispersion using an oscillatory shaking machine Scope iso 842:1984, Raw materials for paints and varnishes Sampling This part of is0 8780 specifies a method for the dis- persion of pigments and extenders using an Iso2431:1984,Paintsandvarnishes-Determination of flow time by use of flow cups. oscillatory shaking machine. The method is suitable for the preparation of dispersions of several sam- Iso 8780-1:1990, Pigments and extenders -- Methods ples in the quality control of pigments. This part is for use in conjunction with the methods of assess- of dispersion for assessment of dispersion charac- teristics ---Part 1:Introduction. mentdescribedinisO8781,usinganagreedbinder system of low viscosity. It should be read in con- Iso 8781-1:1990, Pigments and extenders - Methods junction with Iso 8780-1. of assessment of dispersion characteristics The advantage of the oscillatory shaking Part 1: Assessment from the change in tinting NOTE1 method is that severaf batches of small amounts of mill strength of coloured pigments. base can be tested simultaneously in a closed system where solvent loss is minimized. Iso8781-2:1990.Pigmentsandextenders-Methods ofassessment of dispersioncharacteristics This method is restricted to low-viscosity mill bases Part 2: Assessment from the change in fineness of allowingfree movementofthe grinding spheres (see grind. 7.1). It is not suitable for optimizing mil! base for- mulations for other dispersing techniques. Iso 8781-3:1990, Pigments and extenders -- Methods of assessment of dispersioncharacteristics Part3:Assessmentfromthechangeinglos